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Saved by uncleflo on April 10th, 2021.
In the first edition of the Art and Science of Sails, written by Tom Whidden, president of North Sails Group, LLC, and Michael Levitt, and published by St. Martin’s Press, the authors used Arvel Gentry’s now famous Bathtub Experiment to demonstrate the existence of Circulation, or a second force, that operates around an airfoil, like a sail, wing, or keel etc. Big picture: it’s the combined effort of these two forces that makes the wind speed up on the leeward side — and thus show low pressure — and slow down on the windward side of a sail — high pressure. Gentry was the Boeing engineer who first taught sailors aerodynamics. These diagrams first appeared in Gentry’s Sail magazine articles. In the Revised Edition, the authors used computer testing to show where the wind speeds up around a sail plan and where it slows down. And why and by how much? Nevertheless, Gentry’s experiment is the standard — still popular on the web — and it was left it out of the Revised Edition with trepidation, but we linked in the book to this web page.
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Saved by uncleflo on September 16th, 2014.
Forming a centre of excellence inside The Linde Group, Linde CryoPlants Ltd is a world leader in design, engineering and manufacturing of compact cryogenic air separation plants. High standards, approved to the ISO Quality Management Systems 9001:2008. The product portfolio includes generators for liquid and gaseous nitrogen or oxygen, providing a constant and secure on-site supply. Linde CryoPlants offers custom-made and standard solutions. Most plants are containerised, are simple to install and, where applicable, undergo a strict factory performance test. 125 years of experience and expertise in cryogenics ensure the production of reliable plants, which have been successfully installed and utilised in various different industries and in all parts of the world including extreme surroundings such as the South Pole, the Sahara and the Andes.
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